When using the Smart WAN Selection (SWANS) feature in a load-balanced configuration, it is crucial to account for the bandwidth differences between interfaces.
A common scenario involves combining Ethernet WAN and cellular interfaces. This setup may result in uneven data transfer speeds across connections, as some data streams may move slower than others. Additionally, SWANS may struggle to determine the optimal interface when comparing a cellular connection to a WAN interface with significantly different characteristics.
To avoid potential issues, it is recommended to avoid load-balanced configurations that include interfaces with differing data transfer rates. Thorough testing and validation of the setup can help determine the optimal configuration for a specific environment.
Alternatively, SWANS can be used to select between an Ethernet WAN and a cellular connection, ensuring smoother performance without load balancing.